Leader pin oiler



Nov. 28-, 1939. E. A. B AUMBACH 2,181, 0

LEADER PIN OILER Filed March 4, 1938 Patented Nov. 28, 1939 UNITEDSTATES.

eAT-ENT OFFICE 6 Claims.

This invention relates to improvements in oilers and more particularlyto devices designed for lubricating the leaderpins used in connectionwith punch press die sets. 'The device is adapted to provide anefiicient oiling means for leader pins and may be used in connectionwith any of the usual die sets without material change in any of theelements of the set. The device is adapted to be self-supporting andautomatic in operation when once inserted in place and to retain asupply of oil or other lubricant and keep the pins properly lubricatedat all'times.

It is an object of the present invention to provide an oiler which willapply lubricant overthe 5,;cylindrical surface of the leader pins witheach operation of the punch press and which may be so positioned withrespect to the punch holder and shoe that it will not interfere with theusual operation of the die sets. Also provisionis made 20, whereby anadditional supply of lubricant may be added as required.

A further object is the provision ofa leader pin oiler which may beapplied to any ordinary die set and will be of few parts; cheap tomanug5 facture, easy to assemble, and will not easily'get out of orderin use.

The device also may be manufactured and sold independently of the dieset and. may be applied thereto by the user without change in the dieset or oiler and without the use of tools or any aux- "iliary means forsecuring the oiler in place.

Further objects will be apparent from the.

specification and the appended claims.

In the drawing, Fig. 1 is a vertical sectional view through a diebodiment of the invention.

Fig. 2 is an expanded perspective view in longitudinal section of theoiler housing.

Fig. 3 is an enlarged fragmentary sectional View through the'assembledhousing and corresponds to a portion of the housing shown in section inFig. 1. Fig. 4 is a top plan'viewof one form of wick adapted for use inthe oiler housing.

Referring to the drawing in detail, the embodiment illustrated comprisesa die shoe I having leader pins 2 preferably rigidly secured therein andextending upwardly in parallel relation.

through suitable holes in a punch holder 3. The

punch'holder 3 is preferably provided with suitable hardened bushings 4through which the leader pins 2 extend. Each of the pins may be providedwith a suitable oiler which is supported thereon and which comprises aring-like sheet lubricant chamber therebetween'.

set and one of the oilers and illustrates one em-.

metal container member or'housing member 5 having an inner upturnedflange 6 and an outer upturned flange 1 spaced therefrom to provide anannular trough therebetween. This construction provides an annularlubricant chamber 8 in the container.

A container cover" 9 is provided. and is constructed very similar to thecontainer 5, but slightly smaller in outside diameter and is providedwith an inner downwardly extending flange ill and an outer downwardlyextending flange l I, which latter substantially corresponds in width toflange T! of the container 5. The cover member. 9 is of a suitable sizeto telescope within the container 5 as illustrated and to form a wickholding A ring-like wick i2 is inserted between the members 5 and 9 and,when these members are telescoped together, the wick member iscompressed in such a manner that an annular portion extends inwardlybetween the fiangest and If) in a position to contact with a leader pinwhen the device is placed thereon.

The wick may be a ring or washer of felt or other suitable material suchas illustrated in Fig. 4, or it may be merely a suitable strip of adesired cross section and of suitable length to extend completely aroundthe leader pin. I

f'A body member l3 is'also provided and, if desired, may be identicalwith the member 5. In

fact, an identical member may be used and. merely inverted asillustrated in Fig. 3 and soldered or otherwise secured to the bottom ofthe member 5 as shown at M. It willbe understood that, by thisconstruction members 5 and I3 may be interchangeable and may be formedby the same tools therebyproviding a very cheap construction.v A coilspring 15 is provided which is of sufficient diameter to receive theleader pin 2 therein and the, oiler housing is supported on the upperend of this spring as illustrated in Fig. 1. If desired, the upper endof the spring may be secured in the housing l3 by soldering or any othersuitable means. The spring preferably is of sufficient length to alwaysretain thehousing against the punch holder during any position of theholder so that the oiler housing follows the holder at all times and thefelt wick effectively lubricates the pin over its length with eachoperation of the punch press.

An oil hole I6 is provided through the flange l of the housing member 5and a corresponding hole I! is provided through the flange ll of thecovermember 9. These holes are positioned so that they are in alignmentwhen the device is assembled so that lubricant may be applied to thewick as required.

The device provides many advantages over ordinary methods in that it maybe applied to ordinary die sets without change in any part of either theset or the oiler, and without the use I of special tools. The oilerdevice may easily be removed and replaced and new wicks may be insertedby merely removing the cover member I I.

Modifications may be made withoutdeparting from the spirit of theinvention. It is desired, therefore, that the invention be limited onlyby the prior art and the scope of the appended claims.

Having thus described this invention, what is claimed and desired to besecured by Letters Patent is:

1. A leader pin oiler for die sets comprising a hollow annular housingcomprising two ring-like sheet metal members having wide outer flangestelescoped one within the other, said'members having comparativelynarrow inturned inner flanges spaced from said outer flanges and fromeach other to provide an annular chamber with an annular slot betweenthe edges of said inner flanges, and a wick in said chamber havingannular portion extending from said opening to contact a leader pin whensaid housing is telescoped thereover, and an elongated compressionspring secured to one of said members to resiliently support said oil-eron a die shoe.

2. In a leader pin oiler, a lubricant housing comprising a cup-shapedsheet metal container member having an axial opening to receive a leaderpin, a comparatively narrow inturned flange around said opening toprovide an annular lubricant trough, an inverted cup-like sheet metalcover member having a similar axial opening and a similar comparativelynarrow inturned inner flange, said cover member being telescopicallymounted on said container member whereby said inner flanges are spacedto provide an annular slot between said inner flanges, means betweensaid members for conducting lubricant from said trough to said leaderpin, and an elongated coil spring secured to said container member inaxial relation thereto.

3. In a leader pin oiler, a lubricant housing comprising a cup-shapedsheet metal container member having an axial opening to receive a leaderpin, a comparatively narrow inturned flange around said opening toprovide an annular lubricant trough, an inverted cup-like sheet metalcover member having a similar axial opening and a similar comparativelynarrow inturned inner flange, said cover member being telescoped withinsaid container member whereby said inner flanges are longitudinallyspaced to provide an annular slot between said inner flanges, an annularwick filling a substantial part of the annular chamber in said housingand compressed between said members and extending through said slot toconduct lubricant to said leader pin when telescoped thereover, and anelongated coiled spring secured to one of said members in axial relationthereto and of a diameter not substantially less than the axial openingthrough said housing.

4. A leader pin oiler for die sets comprising an annular housingarranged to be slidably mounted on a leader pin between the die shoe andthe punch holder, said housing comprising two annular trough-likemembers having wide outer flanges and relatively narrow inner flanges,said members being telescoped together in reversed relation wherebytheir telescopic relation is limited by one of the outer flanges, andthe inner flanges are spaced to provide an annular slot therebetween, awick in the chamber formed by said members and having an annular portionextending through said slot, a third member substantially identical withone of said housing members and secured thereto in inverted axialrelation, and an elongated coil spring secured in said lastmember inaxial relation therewith.

5. A leader pin oiler for die sets comprising a hollow annular housingcomprising two ring-like sheet metal members having wide outer flangestelescoped one within the other, said members having comparativelynarrow inturned inner flanges spaced from said outer'flanges and fromeach other to provide an annular chamber with annular slot between theedges of said inner flanges, and a wick in said chamber having anannular portion extending from said opening to contact a leader pin whensaid housing is telescoped thereover, and an elongated compressionspring to resiliently support said oiler on a die shoe.

6. In a leader pin oiler for die sets wherein a movable and a stationarydie set members are positioned for relative movement toward and fromeach other and are retained in operating alignment by leader pins, ahollow annular wick housing comprising a formed ring-like sheet metalmember having a hollow wick chamber and adapted to surround and moveaxially along one of the leader pins, said wick housing having anannular inwardly opening slot communicating with the surface of saidleader pin, an oil-bearing wick member in said chamber and having a partextending inwardly through the annular slot for lubricating engagementwith the leader pin, and a resilient member in adjacent axial alignmentwith the wick housing and urging the same into continuous engagementwith one of said die set members throughout the course of its relativemovement upon said leader pin.

EMIL A. BAUMBACH.

